10. A small pilot study is conducted to investigate the effect of a nutritional supplement on total body weight. Six participants agree to take the nutritional supplement. To assess its effect on body weight, weights are measured before starting the supplementation and then after 6 weeks. The data are shown below. Is there a significant increase in body weight following supplementation? Run the test at a 5% level of significance. Demonstrate the five steps for hypothesis testing and explain your results. Subject Initial Weight Weight after 6 Weeks di ff di ff 1 155 157 - 2 n=6 142 145 - 3 3. 176 180 16 4 180 175 210 209 1. 6. 125 126 1.

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You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.85. You would like to be 97% confident that your esimate is within 4% of the true population proportion. How large of a sample size is required?

2 proportion z-test 3. In a study done in Michigan, it was determined 38 (out of 62) poor children who attended pre-school needed social services later in life compared to 49 (out of 61) poor children who did not attend preschool. Does this study provide significant evidence that preschool reduces the need for social services later in life? 4. A drug company creates a medicine designed to prevent colds, and states that it is equally effective for men and women. To test this claim, they give the medicine to 100 men and 200 women. At the end of the study, 33 men and 95 women caught a cold. Can we say that the drug is equally effective for men and women? (Use a =

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.34. You would like to be 90% confident that your esimate is within 1.5% of the true population proportion. How large of a sample size is required

Hi Please answer all parts in the same format as pictured. Thank you

multiple choice

You want to obtain a sample to estimate the proportion of a population that possess a particular genetic marker.  Based on previous evidence, you believe approximately P∗=15% of the population have the genetic marker.  You would like to be 98% confident that your estimate is within 3% of the true population proportion.  How large of a sample size is required?n =

According to a survey conducted by the Association for Dressing and Sauces, 85% of American adults eat salad at least once a week. A nutritionist suspect that the percentage is higher that this. She conducts a survey of 200 American adults an finds that 171 of them eat salad at least once a week. Conduct the appropriate test that addresses the nutritionist's suspicions. Use the a = 0.1 level of significance. What is the test statistic? t-score population parameter Z-Score standard deviation